Memphis police have arrested siblings along with another woman in connection with a string of armed robberies and carjackings that occurred across Memphis in a two-day span.

Dontreal Holloway, 20, Monica Jones, 19, and a 17-year-old male have been charged with aggravated robbery and carjacking in at least 12 robberies that started Feb. 26 across the city, police said Friday.

Authorities detained the trio Thursday during a traffic stop outside a Target store on U.S. 64. Police said the suspects had gone to the store after carjacking and robbing a woman earlier at Wolfchase Galleria Mall.

The victim was alerted her credit cards were being used at the Target store, police said. Officers went to the area and spotted a gold Jaguar that witnesses told police the suspects fled in after the robbery and carjacking.

Jones and her younger brother were later arrested after their mother turned them in to police, Memphis Police Director Michael Rallings said during a news conference Friday morning about the arrests.

"I want to personally commend her for trying to save her son's life and her daughter's life by doing what's right," Rallings said. "This mother cared enough to know that her son and daughter were on a collision course and she intervened. We need more of that."

Rallings also commended his officers at Appling Farms precinct for their work on the case.

"We are here to show criminals that they will no longer wreak havoc on citizens of Memphis and get away with it," Rallings said.

Police said the dozen armed robberies and carjackings were connected and were committed throughout the city, including the areas of Germantown, Cordova and Southwest Memphis.

The people robbed were mainly targeted in the parking lot of stores and shopping malls. Police said they had their vehicles, purses, phones and credit cards stolen. Several of the victims were physically assaulted during the incidents, police said.

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